UI Suggestions

Since you guys are working on a new UI right now, I thought it would be a good time to post these suggestions
Since I organize my engines by year, I tend to go back and forth from the 40's, 50's and 60's to the 70's and onward pretty often. But it was around that time (in the U.S. anyway, that automakers started the switch to metric units. As such, most of my engines before 1970 are designed with Cubic inches and Feet as measurements, but from the 70's onward they're done in metric. As such, I think that there should be a "mixed" option in the metric/imperial unit selection.
Also, when trying to find engines that fit in car bodies, I noticed that all the engine bays are measured in "volume", while the engines have individual height, width, and length dimensions. In my opinion it would be much better for "engine volume" to be replaced with "Engine dimensions", and list the maximum height, width, and length.
I also have a question about the Quality slider, does it mean "quality of design" or "time taken during manufacturing"? Because those two can be quite different things.
For example; I'm sure it doesn't take a lot of man-hours to manufacture an LS7, but the design of the valvetrain allows it to rev to 6500 and sometimes beyond. Yet in the engine designer, I have to move the quality slider up to 6 or more (which makes the heads VERY expensive) just to get it to rev past 6000.
Since I organize my engines by year, I tend to go back and forth from the 40's, 50's and 60's to the 70's and onward pretty often. But it was around that time (in the U.S. anyway, that automakers started the switch to metric units. As such, most of my engines before 1970 are designed with Cubic inches and Feet as measurements, but from the 70's onward they're done in metric. As such, I think that there should be a "mixed" option in the metric/imperial unit selection.
Also, when trying to find engines that fit in car bodies, I noticed that all the engine bays are measured in "volume", while the engines have individual height, width, and length dimensions. In my opinion it would be much better for "engine volume" to be replaced with "Engine dimensions", and list the maximum height, width, and length.
I also have a question about the Quality slider, does it mean "quality of design" or "time taken during manufacturing"? Because those two can be quite different things.
For example; I'm sure it doesn't take a lot of man-hours to manufacture an LS7, but the design of the valvetrain allows it to rev to 6500 and sometimes beyond. Yet in the engine designer, I have to move the quality slider up to 6 or more (which makes the heads VERY expensive) just to get it to rev past 6000.